Well if there is no universal moral code then how do we know what is moral and what isn't. I mean I could just one day decide that it's wrong to do anything and that would be a moral code.

But, is there a universal moral code that can be agreed upon and if there is, is it then wrong to force other people to adopt said moral code?

It is true that there is such a thing as conscience and sense of duty. But What I am trying to get at is, how do we know if there is, and if there's not then how do we know what should be in a universal moral code. If there was a universal moral code then why is it that certain laws are implemented in one place and not in others? Also, if there is such a thing as a universal conscience and sense of duty, then why are there psychopaths and sociopaths? Clearly they don't have a sense of duty or a conscience and since that is the case then why is it that we impose laws on people without a conscience when we are basing our moral code on our consciences and senses of duty? Isn't that a form of tyranny?